JP2661058B2 - Still image recording device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a still image recording device. 2. Description of the Related Art As a still image recording / reproducing device, a recording / reproducing device in an electronic still camera is known. The recording format of a still video floppy (hereinafter, referred to as an SV floppy) as a recording medium has been standardized by an electronic still video conference. Record on an annular track of a book
The video signal of the frame is to be recorded on two tracks. FIG. 12 shows the configuration of a conventional recording / reproducing system of the SV floppy. At the time of recording, the input video signal 10 is converted into a predetermined recording signal by the recording circuit 11, applied to the video head 13 via the switch 12, and recorded on the SV floppy 14. At the time of reproduction, the reproduction signal from the video head 13 is applied to the reproduction circuit 15 via the switch 12, and is converted into the original video signal by the reproduction circuit 15. [Problems to be Solved by the Invention] In such a recording / reproducing apparatus, when recording a still image at continuous constant time intervals, that is, when performing so-called continuous recording, a user inputs an input video signal to, for example, a television.
The recording trigger button can be operated (on / off) while checking on the monitor screen. However, there is a problem that it is difficult for a user to confirm whether or not an image to be recorded as a still image has been captured at an appropriate timing. To solve such a problem, the recorded image is reproduced immediately after recording and displayed on a television monitor.
A technique called so-called record review is known. However, in this technique, a recorded image is reproduced and displayed on a television monitor immediately after recording, and a user performs recording and display, for example, recording so that a desired still image can be recorded while checking an input image. There has been a problem that the trigger switch cannot be freely pressed. In view of the above, the present invention provides a still image recording apparatus which can confirm a still image to be recorded immediately before or immediately after recording, and at the same time, supply the content of an input video signal to a recording medium while the user confirms the content. With the goal. [Means for Solving the Problems] A still image recording apparatus according to the present invention is an apparatus that records an input video signal as a still image on a recording medium at a timing according to a given recording instruction, and the recording medium Memory means for temporarily storing a video signal corresponding to a still image to be recorded immediately before or immediately after recording on the same screen, and juxtaposing juxtaposition on the same screen so that the output and the input video signal of the memory means can be respectively visually recognized simultaneously. And a synthesizing means. [Operation] By the above means, a still image to be recorded on the recording medium can be confirmed on the composite screen, so that even during continuous shooting, still image recording can be performed while confirming the image actually recorded on the recording medium. Since the recorded still image is displayed on the composite screen during the movement of the recording head, the operability is significantly improved. Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention, and FIG. 2 is a timing chart thereof. When a recording instruction signal (Rec signal) 22 is input to the control circuit 20, the control circuit 20 sets the recording / reproduction switch 24 to the recording side,
The input video signal 26 is converted into a signal for recording by a recording circuit 28, applied to a video head 30 via a switch 24, and recorded on an SV floppy 32. At the same time, the input video signal 26 is converted into a digital signal by the A / D converter 34 and stored in the memory 36. That is, when the Rec signal 22 is input to the control circuit 20, the input video signal at that time is stored in both the SV floppy 32 and the memory 36 as a still image. When the writing to the memory 36 is completed, the control circuit 20
In the read operation state. The signal read from the memory 36 is converted into an analog signal by the D / A converter 38, and the switch 40
Is supplied to the contact b. An input video signal is applied to the contact a of the switch 40, and the switch 40 is switched between the contacts a and b in accordance with a switching control signal from the control circuit 20. Specifically, as shown in FIG. 3, the control circuit 20 controls the TV screen so that the image of the input video signal 26 appears on the large screen and the still image from the D / A converter 38 appears on the small screen. Controls the reading of the switch 40 and the memory 36. That is, the switch 40 functions as a screen composition circuit. During the recording operation, the switch 42 is connected to the contact a (switch 40 side), and while the composite image is selected as the video output 44, the control circuit 20 controls the track feed mechanism 46 to・ Move the head 30 to the next track. In addition, when reproducing the recorded image of the SV floppy 32,
The switches 24 and 42 are connected to the b-contact side, and the reproduction signal from the video head 30 is applied to the reproduction circuit 48 via the switch 24, and the reproduction circuit 48 It is converted and passed through the switch 42 to become the video output 44. As described above, since the still image recorded on the SV floppy 32 immediately before is monitored and output as a part of the composite image, after the still image is recorded, the video head 30 is moved to the next empty track. However, the recorded contents can be viewed until the next still image recording is performed. Therefore, it is possible to continuously record still images while checking the contents of the recorded still images. At the stage where the continuous recording is stopped, the content of the still image recorded immediately before is displayed on the small screen of FIG. 3, but when only the image of the input video signal is to be viewed, the switch 40 is set to the a contact side. You can always connect to. FIG. 4 is a modification of FIG. 1, in which a switch 40 functioning as a screen synthesizing circuit is connected between the memory 36 and the D / A converter. That is, the output of the A / D converter 34 is connected to the contact a of the switch 40, the output of the memory 36 is connected to the contact b, and the output of the switch 40 is connected to the D / A converter 38. As a result, the D / A converter 38 outputs a composite image signal as shown in FIG. The switch 50 switches between the composite image from the D / A converter 38 and the reproduced image from the reproduction circuit 48. Although there are differences in the connection points between the switches 40 and 50 and between the switches 42 and 52, the operation is basically the same as in the case of FIG. Next, a second embodiment will be described. FIG. 5 shows a block diagram of the configuration, and FIG. 6 shows a timing chart thereof. The same components are denoted by the same reference numerals. When the Rec signal 22 is applied to the control circuit 20, the switch 24 is connected to the contact a, the input video signal 26 is converted into a signal for recording by the recording circuit 28, and the SV floppy disk is switched by the switch 24 and the video head 24. Still images are recorded in 32. When the recording is completed, the control circuit 20 switches the switch 24 to the contact b side to set the reproduction side while keeping the video head 30 at the same track position, and sets the memory 36 to a writable state. The recorded still image is reproduced, and the reproduction circuit 48 returns to the original video signal. The video signal output from the reproduction circuit 48 is supplied to the memory 56 via the A / D converter 54. When the writing to the memory 56 is completed, the control circuit 20 switches the memory 56 to the reading operation. The output of the memory 56 is a D / A converter 58
, And is applied to the contact b of the switch 60 as an image synthesizing circuit. The input video signal 26 is applied to the contact a of the switch 60,
Is applied to the contact a of the switch 44, and the output video signal 44 becomes a composite image as shown in FIG. In the embodiment shown in FIG. 5, the video head 30 is moved to the next empty track while the composite image signal is being output as the output video signal 44. Therefore, it is possible to continuously record still images while confirming the still images recorded on the SV floppy 32 with the composite image. FIG. 7 is a block diagram showing the configuration of the third embodiment, and FIG.
The figure shows the timing chart. Re in the control circuit 20
When the c signal 22 is applied, the switches 62 and 70 are connected to the contacts a, and the memory 66 is in a write state. The input video signal 26 passes through the switch 62 and the A / D converter 64 and is written to the memory 66. When the writing to the memory 66 is completed, the memory 66 is set to the reading state, and the switch 24 is connected to the contact a. memory
The signal read from 66 is converted into an analog signal by a D / A converter 68, converted into a predetermined recording signal by a recording circuit 28, and recorded by the video head 30 on the SV floppy 32. When the recording to the floppy 32 is completed, the control circuit 20
The video head 30 is sent to the next empty track by the track feed mechanism 46, and the switch 70 is switched between the a and b contacts so that a video signal of a composite image as shown in FIG. 3 is formed. That is, the image of the input video signal 26 is displayed on the large screen of FIG. 3, and the still image from the D / A converter 68 is displayed on the small screen. The configuration shown in FIG. 7 can be operated according to the timing chart shown in FIG. In the flowchart of FIG. 8, a memory is temporarily stored in the floppy 32 to record a still image.
The signal stored in the floppy disk 32 is used as the content of the recording signal of the floppy 32 for forming a composite image. However, in the flowchart of FIG. The composite image is formed by using the stored signal in the memory 66 and reproducing the data in the memory 66. Hereinafter, a brief description will be given. Control circuit 20
When the Rec signal 22 is applied, the switches 62 and 70 are connected to the contact a side, and the memory 66 is in a write state. Input video signal
26 is a switch 62, A / D converter 64, memory 66, D / A converter 6
8, video head 3 via recording circuit 28 and switch 24
0 and the still image is recorded on the SV floppy 32. When the recording to the SV floppy 32 is completed, the control circuit 20
Connects the switches 24 and 62 to the contact b side and puts the memory 66 in the write state. Since the video head 30 is located on the same track as the previously recorded track, the video head 30 reproduces the previously recorded still image and applies it to the reproducing circuit 48 via the switch 24. The reproduction signal returned to the original video signal by the reproduction circuit 48 is applied to the A / D converter 64 via the switch 62 and written into the memory 66. After the writing to the memory 66 is completed, the memory 66 is set to the reading operation, and the switch 62 is connected to the contact a. Then, as shown in FIG. 3, the switch 70 is switched so that the video of the input video signal 26 appears on the large screen and the still image output from the D / A converter 68 (memory 66) appears on the small screen. While the composite image is being output by the switch 70, the control circuit 20 controls the track feed mechanism 46 to move the video head 30 to the next empty track. FIG. 10 is a modification of the configuration of FIG. 7 in which the input signal of the switch 70 as the image synthesizing circuit is taken.
FIG. 11 shows the connection of the switch 70 changed.
Both operate according to the timing chart shown in FIG. 8 or FIG. In each of the above embodiments, the memories 36, 56, 66 for storing still images
Has been described as operating only in one of reading and writing. Of course, by using a dual-port memory, reading can be performed during data writing. Can be displayed on a small screen, and the recorded still image can be displayed on a large screen. [Effects of the Invention] As can be easily understood from the above description, according to the present invention, both the contents of a still image recorded on a recording medium and the contents of an input video signal are simultaneously checked on a monitor, A recording instruction for image recording can be given, and even in the case of continuous recording, the contents of a recorded image can be sequentially confirmed, which is extremely practical.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention, and FIG.
FIG. 3 is a timing chart thereof, FIG. 3 is an explanatory diagram of a composite screen, FIG. 4 is a modified example of FIG. 1, and FIG.
FIG. 6 is a block diagram showing the configuration of the embodiment of FIG.
7, FIG. 7 is a block diagram of the configuration of the third embodiment, FIG. 8 is a timing chart of FIG. 7, FIG. 9 is a timing chart for another operation of the configuration of FIG. 7, FIG. FIG. 11 shows a modification of FIG. 7, and FIG. 12 shows a conventional configuration example. 20 control circuit, 22 recording instruction signal, 26 input video signal, 30 video head, 32 still video floppy, 46 track feed mechanism

Claims (1)

(57) [Claims] An apparatus for recording an input video signal on a recording medium as a still image at a timing in response to a given recording instruction, wherein a video signal corresponding to a still image to be recorded is temporarily recorded immediately before or immediately after recording on the recording medium. A still image recording apparatus comprising: a memory means for storing; and a juxtaposition synthesizing means juxtaposed on the same screen so that an output of the memory means and an input video signal can be respectively visually recognized simultaneously.